SourceSurfaceSkia.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_GFX_SOURCESURFACESKIA_H_

#define MOZILLA_GFX_SOURCESURFACESKIA_H_

#include "2D.h"

#include "mozilla/Mutex.h"

#include "skia/include/core/SkRefCnt.h"

class SkImage;

class SkSurface;

namespace mozilla {

namespace gfx {

class DrawTargetSkia;

class SnapshotLock;

class SourceSurfaceSkia : public DataSourceSurface {

 public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceSkia, override)

  SourceSurfaceSkia();

  virtual ~SourceSurfaceSkia();

  SurfaceType GetType() const override { return SurfaceType::SKIA; }

  IntSize GetSize() const override;

  SurfaceFormat GetFormat() const override;

  void GiveSurface(SkSurface* aSurface);

  sk_sp<SkImage> GetImage(Maybe<MutexAutoLock>* aLock);

  bool InitFromData(unsigned char* aData, const IntSize& aSize, int32_t aStride,

                    SurfaceFormat aFormat);

  bool InitFromImage(const sk_sp<SkImage>& aImage,

                     SurfaceFormat aFormat = SurfaceFormat::UNKNOWN,

                     DrawTargetSkia* aOwner = nullptr);

  already_AddRefed<SourceSurface> ExtractSubrect(const IntRect& aRect) override;

  uint8_t* GetData() override;

/**

   * The caller is responsible for ensuring aMappedSurface is not null.

*/

  bool Map(MapType, MappedSurface* aMappedSurface) override;

  void Unmap() override;

  int32_t Stride() override { return mStride; }

 private:

  friend class DrawTargetSkia;

  void DrawTargetWillChange();

  sk_sp<SkImage> mImage;

  // This keeps a surface alive if needed because its DrawTarget has gone away.

  sk_sp<SkSurface> mSurface;

  SurfaceFormat mFormat;

  IntSize mSize;

  int32_t mStride;

  Atomic<DrawTargetSkia*> mDrawTarget;

  Mutex mChangeMutex MOZ_UNANNOTATED;

  bool mIsMapped;

};

}  // namespace gfx

}  // namespace mozilla

#endif /* MOZILLA_GFX_SOURCESURFACESKIA_H_ */